Power-shovel.



W. R. LITZEYNBBRG.

POWER SHOVBL.

APPLICATION FILED SEPT.14, 1912.

Patented J an. 6, 1914.

mwm W 1 TED STATES PATEN ornron.

WILLIAM R. LITZENBERG, OF PORTLAND, OREGUN.

rowna-srrovnn Specification of Letters Patent.

Patented Jan. 6, 1914.

To all whom it may concern:

Be it known that 1, WILLIAM R. LITznN- Bane, a citizen of the UnitedStates, resld- 'ing in the city of Portland, county 9f Multnomah, andState of Oregon, have invented ter to be moved, in much the same manneras an ordinary hand shovel or spade is forced into the earth.

Among the salient objects of my invention are,to provide. aower-actuated two-part shovel or spade w 'ch can be moved into variousoperative positions about a horizontal axis constituting a pivotalbearing and which can be mechanically thrust longitudinally, into theearth, or other matter to be moved, for the purpose of taking up a loadthereof; to provide in such a device a power transmission element ormechanism to serve both as a pivotal bearing support for the shovelhandle, and as a means for applying power thereto for forcing one partof the shovel longitudinally into the earth,

and the other part thereof down over the,

load about to be lifted by the shovel, where vby to retain the full loadtherein as said shovel is lifted upon its pivotal support to any desireddischarging or emptying position; to provide in such a device means foroperating said cover or hood at will and independently of the movementof theshovel or spade, with an ejecting element for forcibly ejebting ordischarg ng the load therefrom; to provide in combination with such amachine, power furnishing mechanism with connections therefrom fordriving said pivotal transmission mechanism and also for-lifting andlowerin the shovel thereof with its load; to provi e in a device of thecharacter referred to a suitable carriage support, or turn table,whereby said shovel can be moved bodilyabout a vertical axis intodiiferent operative positions, and, in general, to provide a simple,pract cable and efi'ective power shovel or spade like machinewhich canbe .power operated substantlally' in the same manner as is a hand spadeor shovel manually operated.

In order that others may fully understand my invention, I have shown onthe accompanying sheet of drawings for purposes of illustration, andwill now describe, one practical embodiment thereof.

In the drawings, Figure 1 is a side elevation of one embodiment of theinvention, with parts broken away and in section; and Fig. 2 is a topplan view of thesame, with parts omitted, showing one form of driving oroperating mechanism.

It is to be understood that the invention can be mounted upon andoperated from any suitable carriage support, although it is desirable tomount it upona movable platform or turn table base. I have, therefore,shown ust a small portion of a supporting base, as 1, with track 2, u onwhich a supporting turn table 3 is mova 1y mounted. My shovel or spadeis designated as 4 and is mounted at the end of an operating shaft ormember 5, provided with teeth 6, which mesh with the teeth of Janoperating or driving ear 7, mounted upon a shaft 8 in a manneriereinafter referred to, in a frame or standard 9, upon the turn table3. Mounted upon permitting of its free rocking or pivotal movement aboutsaid shaft 8, and of its free longitudinal movement therethrough underthe action of the ar 7 in either direction. Mounted throng the upperportion of said retaining frame 10, preferably to one side of the s aftor member '5, is a second shaft or member 12, and attached at its lowerend to the other part of said shovel, said part being designated 13 andconstituting a cover orhood, hingedly mounted and adapted to be closeddown u on the load after the shovel proper has een forced into thematerial to be moved,,i n the manner indicated in full lines, Fig. 1.Said operating shaft or handle '12 is also provided with operating teeth14 upon, its under side, in mesh with an operating gear 15.Anti-friction guide rollers. 16-16 in the-upper part of said frame 10serve to hold said operating handle 12' in proper engagement with itsdriving gear 15, while at t e same time permitting 3. This lifting cableextends to and is operable from the power furnishing mechanism in theusual manner for lifting and lowering the shovel. I have also providedan ejector for discharging the load from the shovel. In the shownembodiment of the invention this comprises a member, as 21, with ahinged lip 22, adapted to be moved forwardly as the cover or hood israised in such manner as to scrape the bottom of said shovel during thedischarging operation. This is accomplished' by means of pawls 23, uponthe hood or'cover13, which engage in notches 24, provided for thatpurpose in the enlarged upper ends 25 of the opposite sides of saidmember 21. When said cover handle or shaft 12 is moved longitudinallyinto the position shown in dotted lines, Fig. 1, the cover or hood 13 israised into the dotted line position, and the member21 is movedforwardly, as indicated in dotted lines, ejecting or discharging theload from the shovel. As the shovel is lowered by means of the. liftingcable 18 for another load, the

cover or hood remains up. As the shovel is forced into the earth orother matter said member 21' and. lip 22 are free to be moved therewithas the shovel is forced over the load until they rest in their properpositions. When the shovel has been thus forced into the matter fulllength, the cover orhood is forcibly closed down upon it by thelongitudinal forward movement of its operating shaft or member 12,whereby to retain the load therein while the shovel is again lifted bythe lifting bail and cable 18.

The operating gears 7 and 15 are adapted to be'driven in eitherdirection together or separately, as desired, for the operation of theshovel. As one practical method for driving these operating gears, Ihave shown and will now describe a series of friction driving elements,shown clearly in plan view, Fig. 2. In this form, said gears 7 and 15are each mounted upon a sleeve as 7 and 15, which sleeves carry at theiropposite ends friction disks, designated, respectively,

26 and 27, and said gears, sleeves and'disks are rotatably mounted uponthe shaft 8.

The bearing supports or boxes of the frame or standards 9 for said shaftand sleeves are shown in section, and" designated 99', with the sleeves7 and 15' rotatably mounted therein. As a means for driving saidfriction disks 26 and 27, I have provided two friction cones for eachdisk, designated, 'respectively, 28-29 and 30 -31, mounted at p theopposite ends of two sleeves slidably secured to bearin ings 3636 anends, said sleeves being splined to saidshafts so as to turn therewithand at the same time be slidable thereupon to move the friction conesinto bearing engagement with the friction disks 26 and 27, or intoneutral position, as may be desired. Said shafts 34 and 35 are providedwith driving gears, designated respectively, Y37 and 58, which mesh withother gears 39 and 40, upon a driving shaft 41, driven by means of asprocket wheel 42, which may be. driven by a sprocket chain from anysuitable power furnishing mechanism.

As a means for shiftin the friction cones 28and 29 into and out offrictional engagement with the friction disk'26, I provide a shiftingmechanism comprising a lever 43 and a rod 44, and for shifting thefriction cones 30 and 31 into and out of frictional engagement with thefriction disk27, similar shifting mechanism is provided, comprising alever 45 and a rod 46. These operating rods 44 and 46 may be extended toany shafts 3435, with bear I 3737 at their opposite convenient operatingposition, whereby the operator can easily manipulate said frictiondriving mechanism as'desired, and so as to move the shovel operatingshafts or mem-' here 5 and 12in either direction, either together orseparately, and to any desired distance.

It is to be understood that any mechanically operated transmissionmechanism may be used for pivotally supporting and moving longitudinallythe shovel operating shafts or members, and that any kind of powerfurnishing mechanism maybe used, as may be most practicable under theparticular circumstances, and while I have shown and-described but oneembodiment of the invention, I am aware that modifications and changescan be made therein without and I do not, therefore, limit the inventionto the particular forms here shown, except a as I may be limited by abroad interpretation of the language used in the hereto appended claims.r

I claim:

1. In a power-shovel, a shovel body, an

tion, a suitable carriage support, a combination pivotal andpower-transmission mechanism thereupon, a two-part shovel, one part ofwhich is adapted to be thrust into the earth and the other part of whichis hingedly mounted and adapted to be forced down over said first part,and a supporting and operating arm structure for said shovel comprisingtwo shafts attached at their lower ends to the respective parts of saidshovel and having operative connect-ions through said piv otal andpower-transmission mechanlsm, whereby to be moved longitudinally ineither direction together or independently of each other, in'theoperation of said shovel.

3. A power shovel comprising in combination a two-part shovel, anejector mounted therein, operating connections between said ejector andone of said shovel parts, a supporting and operating arm for said shovelpivotally mounted and comprising two shafts movable longitudinally andconnected at their outer ends to the respective parts of said shovel,power-transmission mechanism, and operating connections to said shaftsfor mechanically moving them longitudinally in either direction tooperate said shovel.

4. A power shovel comprising in combination, a carriage support, acombination pivotal and power-transmission mechanism thereupon, atwo-part shovel, one part of which is adapted to be forced into theearth and the other partof which is hingedly mounted and adapted to beforced down over said first part, an ejector pivotally mounted thereinand operable with the opening movement of said hinged shovel part, and asupporting and operating arm for said shovel comprising two shaftsattached at their lower ends to the respective parts of said shovel andhaving operative connections through said pivotal and power transmissionmechanism, whereby to be moved longitudinally in either directiontogether or independently of each other in the operation of said shovel.

5. In a power shovel, in combination, a revolubly mounted carriagesupport with boom frame, power-transmission mechanism, a supporting andoperating arm pivotally mounted through said power-transmissionmechanism and comprising a pair of shafts movable longitudinallytogether or independently of eachother, a two-part shovel mounted uponsaid arm, one of its parts being hingedly mounted and adapted to beclosed down over the other part, an ejector therein, operativeconnections between said movable part and one of said shafts, opera- 7tive connections between said power-transmission mechanism and saidshafts for me; chanically moving the latter together or independently ofeach other longitudinally in either direction. and means for liftingsaid shovel from said boom frame, substantially as described.

6. In a power shovel, in combination, a two-partshovel, one part ofwhich is adapted to be thrust into the earth or other material, and theother part of which is pivotally mounted and adapted to be closed downthereupon, a supporting arm comprising two shafts pivotally andadjustably supported intermediate their. ends and connected at theirouter ends with the respective parts of said shovel, power-transmissionmechanism for moving said shafts longitudinally in either direction, andlifting means for lifting said shovel upon thepivotal. support for saidsupporting arm.

7. A power shovel comprising in combination, a support, a combinationpivotal and power-transmission mechanism thereupon, a twopart shovelwith the parts thereof hinged together, a supporting arm structuretherefor comprising a pair of operating shafts connected respectively attheir lower ends to the parts of said shovel, said operating shaftspassing through said pivotal and power-transmission mechanism andadapted to be mechanically operated thereby together or independently ofeach other in either direction, and lifting means for lifting saidshovel and supporting arm structure upon its pivotal support,substantially as described.

WILLIAM R. LITZENBERG. In presence of' WM. WATSON, G. A. NICHOLS.

